Patents
Sitemap › C02 - Treatment of water, waste water, sewage, or sludge › C02F - Treatment of water, waste water, sewage, or sludge › C02F 3 - Biological treatment of water, waste water, or sewage
Patents for C02F 3 - Biological treatment of water, waste water, or sewage (46,453)
11/1980
11/26/1980EP0019203A1 Process and apparatus for nitrification and denitrification of waste waters
11/26/1980EP0019055A1 Filtration installation for treating water
11/25/1980US4235720 Underwater aerator
11/25/1980US4235719 Pressurized oxygenation system and method
11/25/1980CA1090490A1 Process for chemical decontamination of layers of earth
11/25/1980CA1090488A1 Apparatus for on-site renovation of sanitary waters
11/25/1980CA1090316A1 Support materials for biological fermentation
11/25/1980CA1090287A1 Apparatus and method for producing methane gas by processing waste materials
11/18/1980CA1090017A1 Waste water treatment rotor
11/12/1980EP0018392A1 Process for eliminating toxic substances contained in waste waters
11/12/1980EP0018374A1 Water treating device
11/12/1980EP0018367A1 An arrangement in apparatus for mixing gases with and dissolving gases in liquids
11/11/1980US4233406 Process for the enzymatic treatment of waste water of wheat starch plants
11/11/1980US4233155 Apparatuses for the anaerobic digestion of natural organic waste
11/04/1980US4231974 Fluids mixing apparatus
11/04/1980US4231874 Gyratory aerobic aeration treatment tank
11/04/1980US4231863 Using a biological reactor
11/04/1980US4231862 Method for the preservation of an activated sludge
11/04/1980CA1089126A1 Apparatus and method for treating sewage
11/04/1980CA1089125A1 Anaerobic treatment
10/1980
10/30/1980WO1980002282A1 Method for bacteriological treatment of manure and high bod industrial wastes
10/30/1980WO1980002281A1 A process for precipitating heavy metals from wastewater
10/29/1980EP0018322A1 Method and apparatus for enriching a liquid with gases
10/29/1980EP0017989A1 Apparatus and process for the aeration of a high solids concentration pseudoplastic liquid-solid mixture
10/29/1980EP0017888A1 Process and device for the removal of proteins and their decomposition products from water
10/28/1980US4230580 Slurry digester and capping arrangement for use therein
10/28/1980US4230578 Sewage effluent volume control and alarm arrangement for pressurized sewage disposal system
10/28/1980US4230570 Aerator
10/28/1980US4230565 Method for purifying phosphate containing waste waters
10/28/1980US4230563 Treatment of biologically-degradable waste
10/28/1980US4230562 Method for depolluting fresh water and salt water bodies from crude oil, petroleum products and their derivatives
10/28/1980CA1088681A1 Injectors and their use in gassing liquids
10/21/1980US4229389 Gas diffuser, aerator, or sparger apparatus
10/21/1980US4229388 Liquid distribution system for contact bodies and the like
10/21/1980US4229302 Waste treatment apparatus with floating platform
10/21/1980CA1088230A1 Liquid aeration to reduce biological oxygen demand
10/21/1980CA1088229A1 Backflushing method and system
10/21/1980CA1088228A1 Aeration method and system
10/21/1980CA1088227A1 Method and apparatus for treating waste matter
10/15/1980EP0017451A1 Apparatus and method for producing a gas in liquid dispersion
10/15/1980EP0017305A1 A method and apparatus for treating biologically degradable waste
10/15/1980EP0017191A1 Process for carrying out and controlling the chemical or biochemical processing in two or more reaction stages or basins arranged in succession
10/15/1980EP0017064A1 Apparatus for the aeration of waste water or sludge
10/15/1980EP0016962A1 Means for removing ascorbic acid from aqueous fluids
10/14/1980US4228112 Ultra-thin rotating disk gas diffuser (and bubble shearing method employing the same)
10/14/1980US4227998 Waste disposal treatment of calcium-containing organically loaded wastewaters
10/14/1980CA1087765A1 Sewage treatment apparatus
10/07/1980US4226719 Treating device for large bodies of water
10/07/1980US4226717 Waste water treatment
09/1980
09/30/1980US4225431 Process and apparatus for the treatment of aqueous waste materials
09/30/1980US4225430 Biological process
09/30/1980US4225381 Using mucor, penicillium, cepalosporium, trichoderma, or aspergillus to remove sulfur compounds
09/30/1980CA1086874A1 Treatment of a liquid by circulation and gas contacting
09/23/1980US4224158 Aeration system and method with tapered nozzle
09/23/1980US4224155 Sewage treatment apparatus
09/18/1980WO1980001906A1 Water purification system employing ozone injection
09/18/1980WO1980001882A1 Gas diffuser,aerator,or sparger apparatus and method
09/17/1980EP0015680A1 Fermentation process and apparatus
09/17/1980EP0015321A1 Process and apparatus for waste water purification
09/16/1980CA1085979A1 Chemical waste water treatment method
09/16/1980CA1085976A1 Treatment of aqueous sludges
09/16/1980CA1085755A1 Method for depolluting fresh and sea water from petroleum products
09/09/1980US4221657 Biological fermentation substrates
09/09/1980US4221656 Method of extracting sludge from sewage
09/09/1980CA1085520A1 Handling of waste material
09/03/1980EP0015050A1 Fluids mixing apparatus
09/03/1980EP0014722A1 Process for treating organic waste
09/02/1980US4220612 Flotation cell feed duct
09/02/1980US4220527 Method of cleaning phosphorus-containing waste water by microorganisms
09/02/1980CA1085067A1 Air diffusers
08/1980
08/26/1980US4219673 2-(Trichloromethyldithio)acetic acid and related compounds
08/26/1980US4219424 Apparatus for enriching oxygen contained in water
08/26/1980CA1084639A1 Two-stage activated sludge process
08/26/1980CA1084410A1 Liquid aeration device
08/20/1980EP0014453A1 Biological water purification device
08/20/1980EP0014394A1 Process for purifying waste water with a high concentration of nitrogen compounds
08/20/1980EP0014364A2 Process for the microbiological degradation of acrylonitrile in aqueous dispersions
08/19/1980US4218540 Method for growing a deammonifying culture and use thereof in wastewater treatment
08/19/1980US4218407 Valved or progressively opening sparger with rigid upper seat
08/19/1980US4218318 Process and apparatus for treating and purifying waste water
08/19/1980CA1084179A1 Method for biological purification of waste water
08/12/1980US4217211 Deep well, subterranean shaft, biooxidation
08/11/1980EP0018374A4 Water treating device.
08/06/1980EP0014136A1 Anaerobic combination clarifier and digester with methane recovery for the purification of waste waters from sugar manufacture
08/06/1980EP0013819A1 Process and apparatus for treatment of wastewater
08/05/1980US4216091 Water aerator
08/05/1980US4216089 Depressurization, degassing, siphons
08/05/1980US4216085 Flotation method and apparatus
08/05/1980CA1083136A1 Helical airfoil shaped aerating mixer blade with trailing end insemination
08/05/1980CA1083058A1 Methane production process by waste fermentation
07/1980
07/29/1980US4215082 Device for injecting a gas into a liquid
07/29/1980US4215081 Liquid aerator
07/29/1980US4214992 Water collecting and distributing apparatus disposed in a lower portion of high speed filter basin
07/29/1980US4214985 Method for sewage treatment with bacteria
07/29/1980US4214887 Sewage and waste water treatment
07/29/1980CA1082821A1 Biological sewage treatment apparatus
07/29/1980CA1082820A1 Method of treating organic waste water
07/29/1980CA1082819A2 Waste treatment system
07/24/1980WO1980001484A1 Process and device for processing waste waters
07/23/1980EP0013538A1 Apparatus for the production of methane from organic wastes
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